﻿using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Diagnostics;
using System.ServiceModel;
using System.Runtime.Serialization;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;


namespace DragDraw.Service
{
    public class UserAccountData : SqlDataManager
    {
        ///<summary>
        ///插入UserAccount信息
        ///</summary>
        ///<exception cref="DataErrorException">数据库执行错误</exception>
        ///<exception cref="DataNotFoundException">查找不到相应记录</exception>
        static public bool Insert(string userID,string password)//what if the id exist?
        {
            SqlCommand curCommand;
            curCommand = new SqlCommand();
            curCommand.CommandType = CommandType.StoredProcedure;
            curCommand.CommandText = "InsertUserAccount";
            curCommand.Parameters.Add("@result", SqlDbType.Int);
            curCommand.Parameters.Add("@userID", SqlDbType.NVarChar, 20);
            curCommand.Parameters.Add("@password", SqlDbType.NVarChar, 20);
            curCommand.Parameters["@result"].Direction = ParameterDirection.Output;
            curCommand.Parameters["@userID"].Value = userID;
            curCommand.Parameters["@password"].Value = password;

            curCommand.Connection = SqlDataManager.OpenConnection();
            int result = 0;
            try
            {
                result = curCommand.ExecuteNonQuery();
            }
            catch (Exception error)
            {
                Console.WriteLine(error.Message);
                throw new DataErrorException("UserAccountData.Insert:执行SqlCommand的时候发生错误！", error);
            }
            finally
            {
                SqlDataManager.CloseConnection(curCommand.Connection);
            }
            if (Convert.ToInt32(curCommand.Parameters["@result"].Value) == 0)//有没有执行sql语句？
            {
                throw new DataErrorException("UserAccountData.Insert:没有执行sql语句！", null);
            }
            if (result <= 0)//执行的sql语句是否成功？
            {
                throw new DataErrorException("UserAccountData.Insert:执行了sql语句，可是sql语句没有影响任何一条记录！", null);
            }
            return true;
        }

        /// <summary>
        /// 删除UserAccount信息
        /// </summary>
        /// <param name="userID">用户ID</param>
        /// <returns></returns>
        static public bool Delete(string userID)
        {
            return true;
        }

        ///<summary>
        ///更新UserAccount信息
        ///</summary>
        ///<exception cref="DataErrorException">数据库执行错误</exception>
        ///<exception cref="DataNotFoundException">查找不到相应记录</exception>
        static public bool Update(string userID,string password)
        {
            SqlCommand curCommand;
            curCommand = new SqlCommand();
            curCommand.CommandType = CommandType.StoredProcedure;
            curCommand.CommandText = "UpdateUserAccount";
            curCommand.Parameters.Add("@result", SqlDbType.Int);
            curCommand.Parameters.Add("@userID", SqlDbType.NVarChar, 20);
            curCommand.Parameters.Add("@password", SqlDbType.NVarChar, 20);
            curCommand.Parameters["@result"].Direction = ParameterDirection.Output;
            curCommand.Parameters["@userID"].Value = userID;
            curCommand.Parameters["@password"].Value = password;

            curCommand.Connection = SqlDataManager.OpenConnection();
            int result = 0;
            try
            {
                result = curCommand.ExecuteNonQuery();
            }
            catch (Exception error)
            {
                Console.WriteLine(error.Message);
                throw new DataErrorException("UserAccountData.Update:执行SqlCommand的时候发生错误！", error);
            }
            finally
            {
                SqlDataManager.CloseConnection(curCommand.Connection);
            }
            if (Convert.ToInt32(curCommand.Parameters["@result"].Value) == 0)//有没有执行sql语句？
            {
                throw new DataInsertException("UserAccountData.Update:没有执行sql语句！", null);
            }
            if (result <= 0)//执行的sql语句是否成功？
            {
                throw new DataErrorException("UserAccountData.Update:执行了sql语句，可是sql语句没有影响任何一条记录！", null);
            }
            return true;
        }
        ///<summary>
        ///查询UserAccount信息
        ///</summary>
        ///<exception cref="DataErrorException">数据库执行错误</exception>
        ///<exception cref="DataNotFoundException">查找不到相应记录</exception>
        static public string Query(string userID)//if does not exist,return null
        {
            string result_password = "";
            SqlCommand curCommand;
            curCommand = new SqlCommand();
            curCommand.CommandType = CommandType.Text;
            curCommand.CommandText = "select * from UserAccount where UserID='" + userID + "'";

            curCommand.Connection = SqlDataManager.OpenConnection();
            bool HasResult = false;
            try
            {
                SqlDataReader reader = curCommand.ExecuteReader(CommandBehavior.SingleRow);
                if (reader.HasRows)
                {
                    HasResult = true;
                    while (reader.Read())
                    {
                        result_password = reader.GetString(2);
                    }
                }
            }
            catch (Exception error)
            {
                Console.WriteLine(error.Message);
                throw new DataErrorException("UserAccountData.Query:执行SqlCommand的时候发生错误！", error);
            }
            finally
            {
                SqlDataManager.CloseConnection(curCommand.Connection);
            }
            if( !HasResult )
            {
                throw new DataNotFoundException("UserAccountData.Query:顺利执行完sql语句，可是没有找到匹配的记录！", null);
            }
            return result_password;
        }
        ///<summary>
        ///显示所有UserAccont信息
        ///</summary>
        ///<exception cref="DataErrorException">数据库执行错误</exception>
        ///<exception cref="DataNotFoundException">查找不到相应记录</exception>
        static public void Show()
        {
            Console.WriteLine("-----UserAccount Table------------------");
            SqlCommand curCommand;
            curCommand = new SqlCommand();
            curCommand.CommandType = CommandType.Text;
            curCommand.CommandText = "select * from UserAccount";
            curCommand.Connection = SqlDataManager.OpenConnection();
            try
            {
                SqlDataReader reader = curCommand.ExecuteReader(CommandBehavior.Default);
                while (reader.Read())
                {
                    Console.WriteLine("{0} {1}", reader.GetString(1), reader.GetString(2));
                }
            }
            catch (Exception error)
            {
                Console.WriteLine(error.Message);
                throw new DataErrorException("UserAccountData.Show:执行SqlCommand的时候发生错误！", error);
            }
            finally
            {
                SqlDataManager.CloseConnection(curCommand.Connection);
                Console.WriteLine("-------------------------------------");
            }
        }
    }
}